2-dimensional shapes
2-dimensional (2D) shapes have only two dimensions, Distance from one end to the other. How long something is, its longest dimension. and The measurement of something from side to side..
A polygon is a closed 2D shape with straight sides. Polygons are named depending on the number of sides:
- Triangle (3 sides)
- Quadrilateral (4 sides)
- Pentagon (5 sides)
- Hexagon (6 sides)
- Octagon (8 sides)
- Decagon (10 sides)
A regular polygon has sides that are equal in length and equal angles. A regular triangle is called an equilateral triangle. A regular quadrilateral is called a square.